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<a href="bvh_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2010-2011, NVIDIA Corporation</span>
<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"> *   * Redistributions of source code must retain the above copyright</span>
<a name="l00008"></a>00008 <span class="comment"> *     notice, this list of conditions and the following disclaimer.</span>
<a name="l00009"></a>00009 <span class="comment"> *   * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00010"></a>00010 <span class="comment"> *     notice, this list of conditions and the following disclaimer in the</span>
<a name="l00011"></a>00011 <span class="comment"> *     documentation and/or other materials provided with the distribution.</span>
<a name="l00012"></a>00012 <span class="comment"> *   * Neither the name of NVIDIA Corporation nor the</span>
<a name="l00013"></a>00013 <span class="comment"> *     names of its contributors may be used to endorse or promote products</span>
<a name="l00014"></a>00014 <span class="comment"> *     derived from this software without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND</span>
<a name="l00017"></a>00017 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00018"></a>00018 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</span>
<a name="l00019"></a>00019 <span class="comment"> * DISCLAIMED. IN NO EVENT SHALL &lt;COPYRIGHT HOLDER&gt; BE LIABLE FOR ANY</span>
<a name="l00020"></a>00020 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span>
<a name="l00021"></a>00021 <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span>
<a name="l00022"></a>00022 <span class="comment"> * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND</span>
<a name="l00023"></a>00023 <span class="comment"> * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00024"></a>00024 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00025"></a>00025 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00026"></a>00026 <span class="comment"> */</span>
<a name="l00027"></a>00027 
<a name="l00032"></a>00032 <span class="preprocessor">#pragma once</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include &lt;<a class="code" href="vector_8h.html" title="Define linear-algebra vector classes.">nih/linalg/vector.h</a>&gt;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;<a class="code" href="bbox_8h.html" title="Defines an axis-aligned bounding box class.">nih/linalg/bbox.h</a>&gt;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &lt;vector&gt;</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include &lt;stack&gt;</span>
<a name="l00038"></a>00038 
<a name="l00039"></a>00039 <span class="keyword">namespace </span>nih {
<a name="l00040"></a>00040 
<a name="l00044"></a><a class="code" href="structnih_1_1_bvh__node.html">00044</a> <span class="keyword">struct </span><a class="code" href="structnih_1_1_bvh__node.html">Bvh_node</a>
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046     <span class="keyword">typedef</span> uint32 Type;
<a name="l00047"></a>00047     <span class="keyword">const</span> <span class="keyword">static</span> uint32 kLeaf     = (1u &lt;&lt; 31u);
<a name="l00048"></a>00048     <span class="keyword">const</span> <span class="keyword">static</span> uint32 kInternal = 0x00000000u;
<a name="l00049"></a>00049     <span class="keyword">const</span> <span class="keyword">static</span> uint32 kInvalid  = uint32(-1);
<a name="l00050"></a>00050 
<a name="l00053"></a><a class="code" href="structnih_1_1_bvh__node.html#a9c5cc985a82d40aa2261f54f4dd6cb48">00053</a>     NIH_HOST NIH_DEVICE <a class="code" href="structnih_1_1_bvh__node.html#a9c5cc985a82d40aa2261f54f4dd6cb48">Bvh_node</a>() {}
<a name="l00059"></a>00059     NIH_HOST NIH_DEVICE <a class="code" href="structnih_1_1_bvh__node.html#a9c5cc985a82d40aa2261f54f4dd6cb48">Bvh_node</a>(<span class="keyword">const</span> Type type, <span class="keyword">const</span> uint32 index, <span class="keyword">const</span> uint32 skip_node);
<a name="l00063"></a>00063         NIH_HOST NIH_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1_bvh__node.html#ab09c9d3422fee1af8c59f71af6ecf64a">set_type</a>(<span class="keyword">const</span> Type type);
<a name="l00067"></a>00067         NIH_HOST NIH_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1_bvh__node.html#a06c1cb6707abd1528279589bece1219b">set_index</a>(<span class="keyword">const</span> uint32 index);
<a name="l00071"></a>00071     NIH_HOST NIH_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1_bvh__node.html#a43b2efd756d9247f3346514acb6b42ef">set_skip_node</a>(<span class="keyword">const</span> uint32 index);
<a name="l00072"></a>00072 
<a name="l00075"></a><a class="code" href="structnih_1_1_bvh__node.html#aa05acdb24d7dcaa05c312f2c438b3222">00075</a>     NIH_HOST NIH_DEVICE <span class="keywordtype">bool</span> <a class="code" href="structnih_1_1_bvh__node.html#aa05acdb24d7dcaa05c312f2c438b3222">is_leaf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (m_packed_data &amp; kLeaf) != 0u; }
<a name="l00078"></a><a class="code" href="structnih_1_1_bvh__node.html#a47f6279f9f1573509bd8432cbba838ba">00078</a>     NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#a47f6279f9f1573509bd8432cbba838ba">get_index</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_packed_data &amp; (~kLeaf); }
<a name="l00081"></a><a class="code" href="structnih_1_1_bvh__node.html#abece4a67339eb87d77bcde89eddc99fd">00081</a>     NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#abece4a67339eb87d77bcde89eddc99fd">get_leaf_index</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_packed_data &amp; (~kLeaf); }
<a name="l00084"></a><a class="code" href="structnih_1_1_bvh__node.html#ad38cb99e5f6fd655af6e8564d33ec13b">00084</a>     NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#ad38cb99e5f6fd655af6e8564d33ec13b">get_skip_node</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_skip_node; }
<a name="l00085"></a>00085 
<a name="l00088"></a><a class="code" href="structnih_1_1_bvh__node.html#a90bab612db7374f45473be06a157af25">00088</a>     NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#a90bab612db7374f45473be06a157af25">get_child_count</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> 2u; }
<a name="l00092"></a><a class="code" href="structnih_1_1_bvh__node.html#aaafd54ee653c9dd8a30df95050db0d1f">00092</a>     NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#aaafd54ee653c9dd8a30df95050db0d1f">get_child</a>(<span class="keyword">const</span> uint32 i)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="structnih_1_1_bvh__node.html#a47f6279f9f1573509bd8432cbba838ba">get_index</a>() + i; }
<a name="l00093"></a>00093 
<a name="l00098"></a><a class="code" href="structnih_1_1_bvh__node.html#ac2b934af5e1eaf6ede62cdfbe787dd92">00098</a>     <span class="keyword">static</span> NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#ac2b934af5e1eaf6ede62cdfbe787dd92">packed_data</a>(<span class="keyword">const</span> Type type, <span class="keyword">const</span> uint32 index)
<a name="l00099"></a>00099     {
<a name="l00100"></a>00100             <span class="keywordflow">return</span> (uint32(type) | index);
<a name="l00101"></a>00101     }
<a name="l00106"></a><a class="code" href="structnih_1_1_bvh__node.html#a441932bfafb05c24dd7feaa01dde6eb9">00106</a>     <span class="keyword">static</span> NIH_HOST NIH_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1_bvh__node.html#ab09c9d3422fee1af8c59f71af6ecf64a">set_type</a>(uint32&amp; <a class="code" href="structnih_1_1_bvh__node.html#ac2b934af5e1eaf6ede62cdfbe787dd92">packed_data</a>, <span class="keyword">const</span> Type type)
<a name="l00107"></a>00107     {
<a name="l00108"></a>00108             packed_data &amp;= ~kLeaf;
<a name="l00109"></a>00109             packed_data |= uint32(type);
<a name="l00110"></a>00110     }
<a name="l00115"></a><a class="code" href="structnih_1_1_bvh__node.html#abd1eb29c4623fc3de7879dc0eb5695c5">00115</a>     <span class="keyword">static</span> NIH_HOST NIH_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1_bvh__node.html#a06c1cb6707abd1528279589bece1219b">set_index</a>(uint32&amp; <a class="code" href="structnih_1_1_bvh__node.html#ac2b934af5e1eaf6ede62cdfbe787dd92">packed_data</a>, <span class="keyword">const</span> uint32 index)
<a name="l00116"></a>00116     {
<a name="l00117"></a>00117             packed_data &amp;= kLeaf;
<a name="l00118"></a>00118             packed_data |= index;
<a name="l00119"></a>00119     }
<a name="l00120"></a>00120     <span class="keyword">static</span> NIH_HOST NIH_DEVICE <span class="keywordtype">bool</span>   <a class="code" href="structnih_1_1_bvh__node.html#aa05acdb24d7dcaa05c312f2c438b3222">is_leaf</a>(<span class="keyword">const</span> uint32 <a class="code" href="structnih_1_1_bvh__node.html#ac2b934af5e1eaf6ede62cdfbe787dd92">packed_data</a>)   { <span class="keywordflow">return</span> (packed_data &amp; kLeaf) != 0u; }
<a name="l00121"></a>00121     <span class="keyword">static</span> NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__node.html#a47f6279f9f1573509bd8432cbba838ba">get_index</a>(<span class="keyword">const</span> uint32 packed_data) { <span class="keywordflow">return</span> packed_data &amp; (~kLeaf); }
<a name="l00122"></a>00122 
<a name="l00123"></a>00123         uint32  m_packed_data;  <span class="comment">// child index</span>
<a name="l00124"></a>00124         uint32  m_skip_node;    <span class="comment">// skip node index</span>
<a name="l00125"></a>00125 };
<a name="l00126"></a>00126 
<a name="l00130"></a><a class="code" href="structnih_1_1_bvh__leaf.html">00130</a> <span class="keyword">struct </span><a class="code" href="structnih_1_1_bvh__leaf.html">Bvh_leaf</a>
<a name="l00131"></a>00131 {
<a name="l00134"></a><a class="code" href="structnih_1_1_bvh__leaf.html#a575996afc9073a3fb11b6b0de62ba9a5">00134</a>         NIH_HOST NIH_DEVICE <a class="code" href="structnih_1_1_bvh__leaf.html#a575996afc9073a3fb11b6b0de62ba9a5">Bvh_leaf</a>() {}
<a name="l00139"></a><a class="code" href="structnih_1_1_bvh__leaf.html#a9b8f2fd33192d9dd22fd90d36cd745f5">00139</a>         NIH_HOST NIH_DEVICE <a class="code" href="structnih_1_1_bvh__leaf.html#a575996afc9073a3fb11b6b0de62ba9a5">Bvh_leaf</a>(
<a name="l00140"></a>00140                 <span class="keyword">const</span> uint32 size,
<a name="l00141"></a>00141                 <span class="keyword">const</span> uint32 index) :
<a name="l00142"></a>00142                 m_size( size ), m_index( index ) {}
<a name="l00143"></a>00143 
<a name="l00146"></a><a class="code" href="structnih_1_1_bvh__leaf.html#a4d533be98689fa2737e74596225724ce">00146</a>         NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__leaf.html#a4d533be98689fa2737e74596225724ce">get_size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_size; }
<a name="l00149"></a><a class="code" href="structnih_1_1_bvh__leaf.html#a47425adef0fb701736abb70bed00334c">00149</a>         NIH_HOST NIH_DEVICE uint32 <a class="code" href="structnih_1_1_bvh__leaf.html#a47425adef0fb701736abb70bed00334c">get_index</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_index; }
<a name="l00150"></a>00150 
<a name="l00151"></a>00151         uint32 m_size;
<a name="l00152"></a>00152         uint32 m_index;
<a name="l00153"></a>00153 };
<a name="l00154"></a>00154 
<a name="l00158"></a>00158 <span class="keyword">template</span> &lt;u<span class="keywordtype">int</span>32 DIM&gt;
<a name="l00159"></a><a class="code" href="structnih_1_1_bvh.html">00159</a> <span class="keyword">struct </span><a class="code" href="structnih_1_1_bvh.html">Bvh</a>
<a name="l00160"></a>00160 {
<a name="l00161"></a>00161         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_vector.html">Vector&lt;float,DIM&gt;</a>       <a class="code" href="structnih_1_1_vector.html">Vector_type</a>;
<a name="l00162"></a>00162         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_bbox.html">Bbox&lt;Vector_type&gt;</a>       <a class="code" href="structnih_1_1_bbox.html">Bbox_type</a>;
<a name="l00163"></a>00163 
<a name="l00164"></a>00164         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_bvh__node.html">Bvh_node</a>                        <a class="code" href="structnih_1_1_bvh__node.html">Node_type</a>;
<a name="l00165"></a>00165         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_bvh__leaf.html">Bvh_leaf</a>                        <a class="code" href="structnih_1_1_bvh__leaf.html">Leaf_type</a>;
<a name="l00166"></a>00166 
<a name="l00167"></a>00167         std::vector&lt;Bvh_node&gt;           m_nodes;
<a name="l00168"></a>00168         std::vector&lt;Bvh_leaf&gt;           m_leaves;
<a name="l00169"></a>00169         std::vector&lt;Bbox_type&gt;          m_bboxes;
<a name="l00170"></a>00170 };
<a name="l00171"></a>00171 
<a name="l00175"></a>00175 <span class="keyword">template</span> &lt;u<span class="keywordtype">int</span>32 DIM&gt;
<a name="l00176"></a><a class="code" href="classnih_1_1_bvh__builder.html">00176</a> <span class="keyword">class </span><a class="code" href="classnih_1_1_bvh__builder.html">Bvh_builder</a>
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 <span class="keyword">public</span>:
<a name="l00179"></a>00179         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_vector.html">Vector&lt;float,DIM&gt;</a>       <a class="code" href="structnih_1_1_vector.html">Vector_type</a>;
<a name="l00180"></a>00180         <span class="keyword">typedef</span> <a class="code" href="structnih_1_1_bbox.html">Bbox&lt;Vector_type&gt;</a>       <a class="code" href="structnih_1_1_bbox.html">Bbox_type</a>;
<a name="l00181"></a>00181 
<a name="l00184"></a><a class="code" href="classnih_1_1_bvh__builder.html#a87624ad195c1b8951139d239cf451dd1">00184</a>         <a class="code" href="classnih_1_1_bvh__builder.html#a87624ad195c1b8951139d239cf451dd1">Bvh_builder</a>() : m_max_leaf_size( 4u ) {}
<a name="l00185"></a>00185 
<a name="l00189"></a><a class="code" href="classnih_1_1_bvh__builder.html#ab712d0638e70ef9ab13c8a83467f858c">00189</a>         <span class="keywordtype">void</span> <a class="code" href="classnih_1_1_bvh__builder.html#ab712d0638e70ef9ab13c8a83467f858c">set_params</a>(<span class="keyword">const</span> uint32 max_leaf_size) { m_max_leaf_size = max_leaf_size; }
<a name="l00190"></a>00190 
<a name="l00198"></a>00198         <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator&gt;
<a name="l00199"></a>00199         <span class="keywordtype">void</span> <a class="code" href="classnih_1_1_bvh__builder.html#a7f5972c2af54b5e320b5db4f6f5f4a49">build</a>(
<a name="l00200"></a>00200                 <span class="keyword">const</span> Iterator  begin,
<a name="l00201"></a>00201                 <span class="keyword">const</span> Iterator  end,
<a name="l00202"></a>00202                 <a class="code" href="structnih_1_1_bvh.html">Bvh&lt;DIM&gt;</a>*               bvh);
<a name="l00203"></a>00203 
<a name="l00206"></a><a class="code" href="classnih_1_1_bvh__builder.html#a7de508b4aad9d948bef5ff164bcb0c3f">00206</a>         uint32 <a class="code" href="classnih_1_1_bvh__builder.html#a7de508b4aad9d948bef5ff164bcb0c3f">index</a>(<span class="keyword">const</span> uint32 i) { <span class="keywordflow">return</span> m_points[i].m_index; }
<a name="l00207"></a>00207 
<a name="l00208"></a>00208 <span class="keyword">private</span>:
<a name="l00209"></a>00209         <span class="keyword">struct </span>Point
<a name="l00210"></a>00210         {
<a name="l00211"></a>00211                 Bbox_type       m_bbox;
<a name="l00212"></a>00212                 uint32          m_index;
<a name="l00213"></a>00213 
<a name="l00214"></a>00214         <span class="keywordtype">float</span> center(<span class="keyword">const</span> uint32 dim)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (m_bbox[0][dim] + m_bbox[1][dim])*0.5f; }
<a name="l00215"></a>00215         };
<a name="l00216"></a>00216 
<a name="l00217"></a>00217         <span class="keyword">struct </span>Node
<a name="l00218"></a>00218         {
<a name="l00219"></a>00219                 uint32          m_begin;
<a name="l00220"></a>00220                 uint32          m_end;
<a name="l00221"></a>00221                 uint32          m_node;
<a name="l00222"></a>00222                 uint32          m_depth;
<a name="l00223"></a>00223         };
<a name="l00224"></a>00224         <span class="keyword">typedef</span> std::stack&lt;Node&gt; Node_stack;
<a name="l00225"></a>00225 
<a name="l00226"></a>00226         <span class="keywordtype">void</span> compute_bbox(
<a name="l00227"></a>00227                 <span class="keyword">const</span> uint32            begin,
<a name="l00228"></a>00228                 <span class="keyword">const</span> uint32            end,
<a name="l00229"></a>00229                 Bbox_type&amp;                      bbox);
<a name="l00230"></a>00230 
<a name="l00231"></a>00231         <span class="keyword">struct </span>Bvh_partitioner;
<a name="l00232"></a>00232 
<a name="l00233"></a>00233         uint32                          m_max_leaf_size;
<a name="l00234"></a>00234         std::vector&lt;Point&gt;      m_points;
<a name="l00235"></a>00235 };
<a name="l00236"></a>00236 
<a name="l00238"></a>00238 <span class="keyword">inline</span> <span class="keywordtype">float</span> compute_sah_cost(<span class="keyword">const</span> Bvh&lt;3&gt;&amp; bvh, uint32 node_index = 0);
<a name="l00239"></a>00239 
<a name="l00240"></a>00240 } <span class="comment">// namespace nih</span>
<a name="l00241"></a>00241 
<a name="l00242"></a>00242 <span class="preprocessor">#include &lt;nih/bvh/bvh_inline.h&gt;</span>
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